The **TLV1117LV12** is a specific variant of the TLV1117LV series. It is a **Low-Dropout (LDO) Linear Regulator** designed to provide a stable, fixed output voltage of **1.2V**. It is widely used in modern electronics due to its high accuracy and low quiescent current. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the TLV1117LV12: | Feature | Specification | | :--- | :--- | | **Output Voltage** | Fixed 1.2V | | **Input Voltage Range** | 2.0V to 5.5V | | **Max Output Current** | 1 Ampere | | **Dropout Voltage** | ~455mV (at 1A load) | | **Quiescent Current ($I_q$)** | 100 µA (Typical) | | **Accuracy** | 1.5% over temperature | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Characteristics & Pinout The device is most commonly found in the **SOT-223** package (surface mount), which balances small size with decent thermal dissipation. #### Typical Pin Configuration (SOT-223): 1. **ADJ/GND**: For the fixed 1.2V version, this pin is connected to Ground. 2. **VOUT**: The regulated 1.2V output pin. 3. **VIN**: The unregulated input voltage pin. 4. **TAB (VOUT)**: The large metal tab is internally connected to VOUT for heat sinking. --- ### 3. Critical Component Features * **Stability with Ceramic Capacitors**: Unlike older linear regulators (like the standard LM1117), the "LV" version is stable with low-ESR ceramic output capacitors (typically 0.1µF to 1.0µF). * **Protection Mechanisms**: * **Thermal Overload**: Shuts down if the chip becomes too hot. * **Current Limit**: Protects the device during a short circuit or over-current event. * **Low Quiescent Current**: It consumes very little power internally, making it suitable for battery-powered or energy-efficient devices. --- ### 4. Application Circuit Example To use this part, you generally only need two external capacitors. ```text Input (2V - 5.5V) ----[ VIN ]-------[ VOUT ]---- Output (1.2V) | | [ 1uF Cap ] [ 1uF Cap ] | | Ground ----------------[ GND ]---------+--------- Ground ``` --- ### 5. Common Use Cases * **Microcontrollers (MCUs)**: Powering the core logic of ARM Cortex-M or DSPs that require a 1.2V rail. * **FPGA Core Power**: FPGAs often require a high-current, low-voltage (1.2V) supply for their internal logic fabric. * **Portable Devices**: Smartwatches and handheld sensors where space and power efficiency are critical. ---